lcd_vga_640_480.c

arm9.rar

/**************************************************************
The initial and control for 640×480 16Bpp TFT LCD----VGA
**************************************************************/

#include "def.h"
#include "2410addr.h"
#include "board.h"
#include "2410slib.h"

extern void printf(char *f, ...) ;
//extern unsigned char girl3_640_480[];	//宽640，高480
extern unsigned char xyx_240_320[];	//宽240，高320

#define CLKVAL_TFT_640480	(1)
//FCLK = 180MHz, HCLK = PCLK = 90MHz
//VCLK = HCLK / [(CLKVAL+1) * 2]     ( CLKVAL >= 0 )
//VCLK = 45MHz		//  34MHz < VCLK < 40MHz

#define MVAL		(13)
#define BSWP		(0)		//Byte swap control
#define HWSWP		(1)		//Half word swap control

#define M5D(n) ((n) & 0x1fffff)	// To get lower 21bits

//TFT 640480
#define LCD_XSIZE_TFT_640480 	(640)	
#define LCD_YSIZE_TFT_640480 	(480)

//TFT 640480
#define SCR_XSIZE_TFT_640480 	(640)
#define SCR_YSIZE_TFT_640480 	(480)

//TFT640480
#define HOZVAL_TFT_640480	(LCD_XSIZE_TFT_640480-1)
#define LINEVAL_TFT_640480	(LCD_YSIZE_TFT_640480-1)

//# 640x480 @ 60 Hz, 31.5 kHz hsync
//Modeline "640x480" 25.175 640 664 760 800 480 491 493 525

//以下参数只针对VGA
//Timing paramete for LCD
#define HFPD_640480		(23)		//水平同步信号的前肩
#define HSPW_640480		(95)		//水平同步信号的脉宽
#define HBPD_640480		(39)		//水平同步信号的后肩

#define VFPD_640480		(10)		//垂直同步信号的前肩
#define VSPW_640480		(1)		//垂直同步信号的脉宽
#define VBPD_640480		(31)	//垂直同步信号的后肩

//volatile static unsigned short LCD_BUFER[SCR_YSIZE_TFT_640480][SCR_XSIZE_TFT_640480];
volatile static unsigned short (*LCD_BUFER)[SCR_XSIZE_TFT_640480] = (void *)0x33400000;

/**************************************************************
640×480 TFT LCD数据和控制端口初始化
**************************************************************/
/*void Lcd_Port_Init( void )
{
    rGPCUP=0xffffffff; // Disable Pull-up register
    rGPCCON=0xaaaa02a8; //Initialize VD[7:0],VM,VFRAME,VLINE,VCLK

    rGPDUP=0xffffffff; // Disable Pull-up register
    rGPDCON=0xaaaaaaaa; //Initialize VD[15:8]
}*/

/**************************************************************
640×480 TFT LCD功能模块初始化
**************************************************************/
static U32 rLCDCON1_save;
static U32 rLCDCON2_save;
static U32 rLCDCON3_save;
static U32 rLCDCON4_save;
static U32 rLCDCON5_save;
static U32 rLCDSADDR1_save;
static U32 rLCDSADDR2_save;
static U32 rLCDSADDR3_save;

void Lcd_Ctrl_Save(void)
{
	rLCDCON1_save = rLCDCON1;
	rLCDCON2_save = rLCDCON2;
	rLCDCON3_save = rLCDCON3;
	rLCDCON4_save = rLCDCON4;
	rLCDCON5_save = rLCDCON5;
	
	rLCDSADDR1_save = rLCDSADDR1;
	rLCDSADDR2_save = rLCDSADDR2;
	rLCDSADDR3_save = rLCDSADDR3;
}

void Lcd_Ctrl_Restore(void)
{
	rLCDCON1 = rLCDCON1_save & ~1;
	rLCDCON2 = rLCDCON2_save;
	rLCDCON3 = rLCDCON3_save;
	rLCDCON4 = rLCDCON4_save;
	rLCDCON5 = rLCDCON5_save;
	
	rLCDSADDR1 = rLCDSADDR1_save;
	rLCDSADDR2 = rLCDSADDR2_save;
	rLCDSADDR3 = rLCDSADDR3_save;
	
	rLCDCON1 |= 1;
}

static void Lcd_Init(void)
{
	rLCDCON1=(CLKVAL_TFT_640480<<8)|(1<<7)|(3<<5)|(12<<1)|0;
    	// TFT LCD panel,16bpp TFT,ENVID=off
	rLCDCON2=(VBPD_640480<<24)|(LINEVAL_TFT_640480<<14)|(VFPD_640480<<6)|(VSPW_640480);
	rLCDCON3=(HBPD_640480<<19)|(HOZVAL_TFT_640480<<8)|(HFPD_640480);
	rLCDCON4=(MVAL<<8)|(HSPW_640480);
	rLCDCON5=(1<<11)|(1<<10)|(0<<9)|(0<<8)|(1<<3)|(BSWP<<1)|(HWSWP);

	rLCDSADDR1=(((U32)LCD_BUFER>>22)<<21)|M5D((U32)LCD_BUFER>>1);
	rLCDSADDR2=M5D( ((U32)LCD_BUFER+(SCR_XSIZE_TFT_640480*LCD_YSIZE_TFT_640480*2))>>1 );
	rLCDSADDR3=(((SCR_XSIZE_TFT_640480-LCD_XSIZE_TFT_640480)/1)<<11)|(LCD_XSIZE_TFT_640480/1);
	rLCDINTMSK|=(3); // MASK LCD Sub Interrupt
	rLPCSEL&=(~7); // Disable LPC3480
	rTPAL=0; // Disable Temp Palette
}

/**************************************************************
LCD视频和控制信号输出或者停止，1开启视频输出
**************************************************************/
static void Lcd_EnvidOnOff(int onoff)
{
    if(onoff==1)
	rLCDCON1|=1; // ENVID=ON
    else
	rLCDCON1 =rLCDCON1 & 0x3fffe; // ENVID Off
}

/**************************************************************
LPC3600 is a timing control logic unit for LTS350Q1-PD1 or LTS350Q1-PD2
**************************************************************/
static void Lcd_Lpc3600Enable(void)
{
    rLPCSEL&=~(7);
    rLPCSEL|=(7); // 640480,Enable LPC3480
}    

/**************************************************************
320×240 8Bpp TFT LCD 电源控制引脚使能
**************************************************************/
static void Lcd_PowerEnable(int invpwren,int pwren)
{
    //GPG4 is setted as LCD_PWREN
    rGPGUP = rGPGUP|(1<<4); // Pull-up disable
    rGPGCON = rGPGCON|(3<<8); //GPG4=LCD_PWREN
    
    //Enable LCD POWER ENABLE Function
    rLCDCON5 = rLCDCON5&(~(1<<3))|(pwren<<3);   // PWREN
    rLCDCON5 = rLCDCON5&(~(1<<5))|(invpwren<<5);   // INVPWREN
}

/**************************************************************
640×480 TFT LCD移动观察窗口
**************************************************************/
static void Lcd_MoveViewPort(int vx,int vy)
{
    U32 addr;

    SET_IF(); 
	#if (LCD_XSIZE_TFT_640480<32)
    	    while((rLCDCON1>>18)<=1); // if x<32
	#else	
    	    while((rLCDCON1>>18)==0); // if x>32
	#endif
        addr=(U32)LCD_BUFER+(vx*2)+vy*(SCR_XSIZE_TFT_640480*2);
	rLCDSADDR1= ( (addr>>22)<<21 ) | M5D(addr>>1);
	rLCDSADDR2= M5D(((addr+(SCR_XSIZE_TFT_640480*LCD_YSIZE_TFT_640480*2))>>1));
	CLR_IF();
}    

/**************************************************************
640×480 TFT LCD移动观察窗口
**************************************************************/
static void MoveViewPort(void)
{
    int vx=0,vy=0,vd=1;

    printf("\n*Move the LCD view windos:\n");
    printf(" press 8 is up\n");
    printf(" press 2 is down\n");
    printf(" press 4 is left\n");
    printf(" press 6 is right\n");
    printf(" press Enter to exit!\n");

    while(1)
    {
    	switch(getch())
    	{
    	case '8':
	    if(vy>=vd)vy-=vd;    	   	
        break;

    	case '4':
    	    if(vx>=vd)vx-=vd;
    	break;

    	case '6':
                if(vx<=(SCR_XSIZE_TFT_640480-LCD_XSIZE_TFT_640480-vd))vx+=vd;   	    
   	    break;

    	case '2':
                if(vy<=(SCR_YSIZE_TFT_640480-LCD_YSIZE_TFT_640480-vd))vy+=vd;   	    
   	    break;

    	case '\r':
   	    return;

    	default:
	    break;
		}
	printf("vx=%3d,vy=%3d\n",vx,vy);
	Lcd_MoveViewPort(vx,vy);
    }
}

/**************************************************************
640×480 TFT LCD单个象素的显示数据输出
**************************************************************/
static void PutPixel(U32 x,U32 y,U16 c)
{
    if(x<SCR_XSIZE_TFT_640480 && y<SCR_YSIZE_TFT_640480)
		LCD_BUFER[(y)][(x)] = c;
}

/**************************************************************
640×480 TFT LCD全屏填充特定颜色单元或清屏
**************************************************************/
static void Lcd_ClearScr( U16 c)
{
	unsigned int x,y ;
		
    for( y = 0 ; y < SCR_YSIZE_TFT_640480 ; y++ )
    {
    	for( x = 0 ; x < SCR_XSIZE_TFT_640480 ; x++ )
    	{
			LCD_BUFER[y][x] = c ;
    	}
    }
}

/**************************************************************
LCD屏幕显示垂直翻转
// LCD display is flipped vertically
// But, think the algorithm by mathematics point.
//   3I2
//   4 I 1
//  --+--   <-8 octants  mathematical cordinate
//   5 I 8
//   6I7
**************************************************************/
static void Glib_Line(int x1,int y1,int x2,int y2, U16 color)
{
	int dx,dy,e;
	dx=x2-x1; 
	dy=y2-y1;
    
	if(dx>=0)
	{
		if(dy >= 0) // dy>=0
		{